Ceiling light Installation problem


What is the minimum distance of 2 screw hole is required?




Thank you for your reply. I am going to buy the ceiling light. I measured the existing screw hole from centre to centre which has 50mm. Enough to install this light without drilling any new hole, isn’t it?




I have existing screw holes and the distance is 18cm. What is the maximum screw hole distance?


Over 20 cm